Pampers Swaddlers for a newborn and then after size 2 (they only go to size 2 I believe) Huggies. I prefer Huggies over Pampers because I find the Pampers to be too thin (almost cheap) and the elastic is not as tight as the Huggies.

I found Huggies to be the only diaper that fit my daughter as a newborn but as she got bigger other brands like Pampers, Target brand, and Luvs seemed to do ok, but i still like Huggies the best, they just seem to fit better.

Pampers Swaddlers are the BEST I've used. I looove them. But, they are pricey so now that lo's poops aren't so runny I use the Costco Kirkland brand diapers. They're the closest I've found to the Swaddlers